CircleCI

CircleCI is a cloud-hosted continuous integration and delivery platform that runs automated pipelines to build, test and deploy code changes from version control. It is designed to validate changes before they reach production, including changes produced by developers, AI agents and models, and to provide feedback and release control across the delivery process.

Pipelines support concurrency, resource classes, caching, test orchestration and insights, with integrations across cloud platforms, containers, Kubernetes, deployment, security, testing and monitoring tools. The platform includes a command-line interface, orbs for reusable pipeline configuration, and features for autonomous validation, smarter test selection, automated fixes and release management with rollback. It works with version control systems including GitHub, GitLab and Bitbucket, and supports a wide range of languages, frameworks and deployment targets.

CircleCI is aimed at developers, platform and security engineers, engineering managers and AI agents. It offers a free plan, a trial and a startup program providing compute credits for qualifying startups. Usage is credit-based, with resource classes and concurrency affecting consumption.